After installing Ios7 even if I disable background apps, the phone never disconnects from the wireless network! I left it to sleep for a few hours and with nothing running I lost nearly 40% of my battery, and the wireless was still connected. Any idea on how to fix this?

After installing Ios7 even if I disable background apps, the phone never disconnects from the wireless network! I left it to sleep for a few hours and with nothing running I lost nearly 40% of my battery, and the wireless was still connected. Any idea on how to fix this?

In your toggles... turn off wi-fi. (Access toggles by swipping up from bottom of screen)